java.lang.NullPointerException

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Solutions on the web123955

  • via Terracotta by unnutz, 1 year ago
    This exception has no message.
  • This exception has no message.
  • This exception has no message.
  • Stack trace

    • java.lang.NullPointerException at java.awt.Container.addNotify(Container.java:2049) at javax.swing.JComponent.addNotify(JComponent.java:4291) at java.awt.Container.addNotify(Container.java:2049) at javax.swing.JComponent.addNotify(JComponent.java:4291) at java.awt.Container.addNotify(Container.java:2049) at javax.swing.JComponent.addNotify(JComponent.java:4291) at javax.swing.JRootPane.addNotify(JRootPane.java:676) at java.awt.Container.addNotify(Container.java:2049) at java.awt.Window.addNotify(Window.java:418) at java.awt.Dialog.addNotify(Dialog.java:389) at java.awt.Dialog.conditionalShow(Dialog.java:454) at java.awt.Dialog.show(Dialog.java:524) at java.awt.Component.show(Component.java:1133) at java.awt.Component.setVisible(Component.java:1088) at workbench.MainWindow.actionPerformed(MainWindow.java:188)

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